Katherine Feng / Giant Panda (Ailuropoda melanoleuca) baby being weighed on a scale at the China Conservation and Research Center for the Giant Panda, Wolong Nature Reserve, China

Francisco Marquez / Volunteer weighing a Greater flamingo (Phoenicopterus ruber) juvenile while another volunteer notes the data during the ringing process, Fuente de Piedra lagoon, Malaga, Spain. August.

Francisco Marquez / Volunteer weighing a Greater flamingo (Phoenicopterus ruber) juvenile during the ringing process, Fuente de Piedra lagoon, Malaga, Spain. August.

Suzi Eszterhas / Striped Skunk (Mephitis mephitis) one month old orphaned babies being weighed, Sarvey Wildlife Care Center, Arlington, Washington

Edwin Giesbers / Eagle owl (Bubo bubo) chick on scales during ringing session. Netherlands. February 2016.

Edwin Giesbers / Man placing Eagle owl (Bubo bubo) chick on scales during ringing session. Netherlands. February 2016.

Edwin Giesbers / Man weighing Eagle owl (Bubo bubo) chick during ringing session. Netherlands. February 2016.

Suzi Eszterhas / Koala (Phascolarctos cinereus), male sick with chlamydia on scale while under anaesthetic. Currumbin Wildlife Hospital, Queensland, Australia, captive.

Suzi Eszterhas / Koala (Phascolarctos cinereus) Joey aged eight months, sick with urinary tract infection, on scales, Dreamland, Queensland, Australia, captive.

ZSSD / Jaguar (Panthera onca) cub being weighed, San Diego Zoo, California

Suzi Eszterhas / Virginia Opossum (Didelphis virginiana) twelve week old orphaned young on scale, WildCare, San Rafael, California

Suzi Eszterhas / Virginia Opossum (Didelphis virginiana) ten week old orphaned young on scale, WildCare, San Rafael, California

Suzi Eszterhas / Coquerel's Sifaka (Propithecus coquereli) newborn on scale, Duke Lemur Center, North Carolina

Suzi Eszterhas / Aye-aye (Daubentonia madagascariensis) three month old baby on scale, Duke Lemur Center, North Carolina

Suzi Eszterhas / Aye-aye (Daubentonia madagascariensis) three month old baby on scale, Duke Lemur Center, North Carolina

Suzi Eszterhas / Sea Otter (Enhydra lutris) three week old orphaned pup on scale, Alaska SeaLife Center, Seward, Alaska

Pete Oxford / Beans for sale in market, Upper Subansiri District. Arunachal Pradesh, North East India, November 2014.

Suzi Eszterhas / Malayan Pangolin (Manis javanica) three month old baby on scale, Carnivore and Pangolin Conservation Program, Cuc Phuong National Park, Vietnam

Suzi Eszterhas / Malayan Pangolin (Manis javanica) three month old baby being weighed by caretaker, Carnivore and Pangolin Conservation Program, Cuc Phuong National Park, Vietnam

Suzi Eszterhas / Chinese Pangolin (Manis pentadactyla) twelve day old orphaned baby on scale, Taipei Zoo, Taipei, Taiwan, digitally removed highlight in foreground

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) conservationist, Judy Avey-Arroyo, and biologist, Rebecca Cliffe, weighing sloth, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) two month old baby on scale, Aviarios Sloth Sanctuary, Costa Rica

Tui De Roy / Okarito Kiwi (Apteryx rowi) chick being weighed after hatching as part of breeding program, West Coast Wildlife Centre, New Zealand

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother and eight month old joey on scale, Queensland, Australia

Solvin Zankl / [captive] Green toads (Bufo viridis) on scale, Lake Coghinas ( Lago di Coghinas) is an artificial lake, in northern Sardinia, Italy

Nick Upton / Common / Hazel dormouse (Muscardinus avellanarius) being weighed in a plastic pot on a mini balance during a survey by Backwell Enviroment Trust in coppiced woodland near Bristol, Somerset, UK, Octobe...

Konrad Wothe / Newborn kitten being weighed on scales

Cheryl-Samantha Owen / African penguin (Spheniscus demersus) egg being weighed, part of Chick Bolstering Project, Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), South Africa May 2012

Cyril Ruoso / Western Lowland Gorilla (Gorilla gorilla gorilla) five year old orphan being weighed, part of reintroduction project by Aspinall Foundation, Bateke Plateau National Park, Gabon

Terry Whittaker / 2020VISION / Myotis bat probably a Daubenton's bat (Myotis daubentoni) being weighed by researcher near Faversham, Kent, UK, September 2010

Terry Whittaker / 2020VISION / Myotis bat probably a Daubenton's bat (Myotis daubentoni) being weighed inside a stocking, by researchers, Kent, UK, September 2010

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni)orphan baby being weighed, Aviarios Sloth Sanctuary, Costa Rica

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researchers, Jennifer Aragon, Michael Johns, and Ilana Nimz, weighing chicks taken from artifical nesting burrows near research station, South Farallon Island...

ZSSD / Jaguar (Panthera onca) cub being weighed, native to Central and South America

Stephen Belcher / Northern Royal Albatross (Diomedea sanfordi) chick being weighed by researchers, Taiaroa Head, Otago, New Zealand

Mark Hamblin / 2020VISION / Research scientist weighing Hen harrier chick (Circus cyaneus) Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Petra Wegner / Domestic Cat, black short haired, too fat / overweight, sitting on weighing scales

Pete Oxford / Waved Albatross (Phoebastria irrorata) being weighed by researcher, Hood Island, Galapagos Islands, Ecuador

Eric Baccega / Keeper weighing a giant panda baby (Ailuropoda melanoleuca) aged 5 months at Wolong nursery, Wolong Nature Reserve, China, Captive

Gary K. Smith / Home grown Runner Beans (Phaseolus sp.) in traditional country kitchen with rustic weighing scales, England, UK

Gary K. Smith / Home grown Runner Beans (Phaseolus sp.) in traditional country kitchen with rustic weighing scales, England, UK

Gary K. Smith / Home grown tomatoes (Solanum lycopersicum) with old-fashioned weighing scales in a traditional English country kitchen

Gary K. Smith / Home grown tomatoes (Solanum lycopersicum) with old-fashioned weighing scales in a traditional English country kitchen

Gary K. Smith / Home grown tomatoes (Solanum lycopersicum) with old-fashioned weighing scales in a traditional English country kitchen

Rolf Nussbaumer / Wildlife biologist banding, weighing and conducting research on Ferruginous Pygmy Owl {Glaucidium brasilianum} Willacy County, Rio Grande, Texas, USA 2007

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) researcher trying to weigh wiggly cub in nursery, Wolong Nature Reserve, China

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) baby being weighed on a scale at the China Conservation and Research Center for the Giant Panda, Wolong Nature Reserve, China

Pete Oxford / Weighing scales for gold mined at "Andrano-Tsimaty" village, Madagascar.

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) infant being weighed at the China Conservation and Research Center for the Giant Panda, Wolong Nature Reserve, China

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) infant being weighed, China Conservation and Research Center for the Giant Panda, Wolong Nature Reserve, China

Flip Nicklin / Salmon (Oncorhynchus sp) farmed fry being weighed at Tofino hatchery, for eventual release to enhance wild populations, Tofino, Vancouver Island, British Columbia, Canada

Pete Oxford / Gold for sale panned from Tambopata river, Amazonia, Peru

Ralph Pace / Gulf Sturgeon (Acipenser oxyrinchus) biologist weighing fish before tagging, Apalachicola River, Florida

Suzi Eszterhas / Northern Slow Loris (Nycticebus bengalensis) rehabilitator, Bui Thi Hanh, weighing young from female that was rescued from illegal wildlife trade while pregnant, Endangered Primate Rescue Center, Cuc...

Suzi Eszterhas / Northern Slow Loris (Nycticebus bengalensis) rehabilitator, Bui Thi Hanh, weighing young from female that was rescued from illegal wildlife trade while pregnant, Endangered Primate Rescue Center, Cuc...

Suzi Eszterhas / Northern Slow Loris (Nycticebus bengalensis) young from female that was rescued from illegal wildlife trade while pregnant being weighed, Endangered Primate Rescue Center, Cuc Phuong National Park, Vi...

Suzi Eszterhas / Red-shouldered Hawk (Buteo lineatus) three-week-old orphaned chick being weighed, WildCare Wildlife Rehabilitation Center, San Rafael, California

Suzi Eszterhas / Striped Skunk (Mephitis mephitis) rehabilitator, Jessie Paolello, weighing one month old orphan young, Sarvey Wildlife Care Center, Arlington, Washington

Suzi Eszterhas / Canada Goose (Branta Canadensis) orphan gosling on scale, International Bird Rescue, Fairfield, California

Suzi Eszterhas / Mallard (Anas platyrhynchos) two day old orphan duckling calling while on scale, International Bird Rescue, Fairfield, California

Suzi Eszterhas / Mallard (Anas platyrhynchos) rehabilitator, Isabel Luevano, weighing two day old orphan duckling, International Bird Rescue, Fairfield, California

Suzi Eszterhas / American Avocet (Recurvirostra americana) three day old orphan chick on scale, International Bird Rescue, Fairfield, California

Suzi Eszterhas / Tasmanian Devil (Sarcophilus harrisii) conservationist, Wade Anthony, and researcher weighing devil in bag, Devils at Cradle, Cradle Mountain-Lake Saint Clair National Park, Tasmania, Australia

Suzi Eszterhas / Mule Deer (Odocoileus hemionus) conservationist, Diane Nicholas, weighing three day old fawn, Kindred Spirits Fawn Rescue, Loomis, California

Jaymi Heimbuch / Coyote (Canis latrans) biologist, Marcus Mueller, weighing coyote during collaring in nature preserve near University of Wisconsin-Madison, Madison, Wisconsin

Suzi Eszterhas / Eastern Fox Squirrel (Sciurus niger) three week old orphaned young on scale, WildCare, San Rafael, California

Suzi Eszterhas / Mallard (Anas platyrhynchos) four day old orphaned duckling being weighed, WildCare, San Rafael, California

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) biologist, Rebecca Cliffe, weighing sloth, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Koala (Phascolarctos cinereus) female being weighed by caretaker Amanda Taylor, Currumbin Wildlife Sanctuary, Queensland, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) male with KoRv retrovirus being weighed, Currumbin Wildlife Hospital, Queensland, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) orphaned joey named Neil being weighed, Koala Hospital, Port Macquarie, Australia

Cyril Ruoso / Komodo Dragon (Varanus komodoensis) adult being weighed Tim Jessup and research team, Rinca Island, Komodo National Park, Indonesia

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) orphaned baby on scale, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) orphaned baby weighed by sanctuary worker Claire Trimer, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) six month old orphan baby with red hair from treatment for mange weighed by sanctuary worker Claire Trimer, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) six month old orphaned baby being weighed, Aviarios Sloth Sanctuary, Costa Rica

Petra Wegner / Cavalier King Charles Spaniel, one-day puppy, black-and-tan, being weighed on scales

Petra Wegner / Cavalier King Charles Spaniel, one-day puppy, ruby, being weighed on scales

Petra Wegner / Cavalier King Charles Spaniel, three-day puppy, black-and-tan, being weighed on scales

Suzi Eszterhas / Sea Otter (Enhydra lutris) veterinarian, Pam Tuomi, weighing rescued three month old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Eduardo Blanco / European mink (Mustela lutreola) being weighed after being anaesthetised for operation, Peralta. Navarra province, Spain. Mink was taken from wild then released. Critically endangered.

Charlie Hamilton-James / Dead Brown rat (Rattus norvegicus) on weighing scales, research for a Rat pheromone project by Fordham University, Brooklyn New York City, USA.

Eric Baccega / Female Giant panda (Ailuropoda melanoleuca) cub, Huanlili, age 3 months, on weighing scale, Beauval Zoo, St.Aignan, France, November 2021.

Eric Baccega / Chinese panda keeper, Luy Riuqing, weighing female Giant panda (Ailuropoda melanoleuca) cub, Yuandudu, age 3 months, Beauval Zoo, St.Aignan, France, November 2021. EDITORIAL USE ONLY.

Edwin Giesbers / A wild Fire salamander (Salamandra salamandra) about to be weighed, part of a program to capture the last wild population in the Netherlands and keep it safe in GaiaZOO to prevent infection from a dea...

Edwin Giesbers / A wild Fire salamander (Salamandra salamandra) being weighed, part of a program to capture the last wild population in the Netherlands and keep it safe in GaiaZOO to prevent infection from a deadly fu...

Edwin Giesbers / Zookeeper Nienke weighing a European hamster (Cricetus cricetus) which is part of a breeding program run by GaiaZOO, Kerkade, The Netherlands. May. Model released.

Doug Gimesy / Koala (Phascolarctos cinereus) female aged 12 month under anaesthetic, on scales during health check. Temporarily captive, until old enough to be released. Currumbin Wildlife Hospital, Gold Coast, Que...

Doug Gimesy / Grey-headed flying-fox (Pteropus poliocephalus) recovering on scales following surgery to amputate toe. Temporarily captive, to be released once recovered. Currumbin Wildlife Hospital, Gold Coast, Que...

Doug Gimesy / Grey-headed flying-fox (Pteropus poliocephalus), rescued bat on scales in order to monitor weight. Matcham, New South Wales, Australia. December 2019. Model released.